A standard urine drug screen (uds) usually does not test for ethanol (alcohol in beer/wine/etc.

). Alcohol is usually tested by a blood alcohol level (bal) via blood draw. However, there is a test for urine that looks for ethyl glucuronide (etg), which is a breakdown product of ethanol, and is specifically designed to determine if you've had alcohol in the last 80 hours.
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The tablet may not be scored to facilitate even splitting. The normal dose is either 5mg or 10mg. Note that an extended release form of this medication comes in a caplet form, which you cannot break in half, but this is usually in a 15mg or 30mg dosage.
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Your symptoms are most likely related to an intervertebral disc, in which there may be a tear or even herniation.

When the symptoms radiate from the back down through the buttock or into the hip/leg region, it suggests that a nearby nerve root is irritated. Seek a spine md if you have any numbness, tingling, weakness, or bowel/bladder problems, or if pain persists despite taking nsaids for >1wk.
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Physical therapy, anti-inflammatories, and activity modification all help to speed up the process. Rarely does pain persist, but when it does patients have other treatment options to help reduce symptoms. A spine specialist such as a physiatrist can prescribe specific exercises depending on the specific cause of sciatica.
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There are many causes of low back pain, but most commonly sudden severe low back pain is from a tear, bulge, or herniation of an intervertebral disc.

Depending on your age and other factors, your symptoms can be from other causes as well, such as a slippage of one vertebra on another, or other less common causes. You should see a physiatrist or other spine specialist for evaluation.
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Depending on your injury there may be some special considerations to keep in mind, and for this reason you may want to meet with a physical medicine & rehabilitation (pm&r) physician who specializes in spinal cord injuries (sci). You, like anyone else, can also have difficulty getting pregnant, and you should see your ob/gyn for this.
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